Method of and device for producing slubbing on drawing frames



Nov. 15, 1938.. B, R S 2,136,923

METHOD OF AND DEVICE FOR PRODUCING SLUBBING 0N DRAWING FRAMES Filed June 29, 1937 2 Sheets-Sheet l B. PROSS 2,136,923 METHOD OF AND DEVICE FOR PRODUCING SLUBBING' ON DRAWING FRAMES Nov. 15, 1938.

Filed June 29, 1937 2 Sheets-Sheet 2 722002 for:-

Patented Nov. 15, 1938 METHOD or AND DEVICE FOR PRODUCING SLUBBING N DRAWING FRAMES Bernhard Pross, Bocholt, Germany Application June 29, 1937, Serial No. 150,985

, In Germany September 23, 1936 Claims.

This invention relates to a method of and device for producing slubbing on drawing frames with the object of obviating several hitherto required working operations on the flier.

According to the invention the slivers, after having passed through the first drawing frame, are led either singly or in combination, through a non-rotary condensing funnel and then passed between pressing rolls which are under the influence of pressing elements. In this manner two or all the working operations on the fliers will be obviated. The funnel or funnels is or are so arranged that the delivery end will be in close'proximity to and almost in contact with the pressing rolls one of which is urged against the other by a force greater than its weight.

The receiving containers are preferably subdivided by partitions.

The invention also includes a particular construction of the funnel which has a three cm. long, cylindrical or tapering delivery passage at the end of which a clamping spring or springs are provided. l I

By the improved method the material will be subjected to a very tender treatment. A greater part of the count fluctuations on the fliers will be obviated. The tensile strength of the yarn will be considerably increased. The amount of slubbing containable in each receiving will be increased by about two thirds of the weight. Moreover, the improved method and device ensures a reduction of about 60% in the number of operatives required, and at the same time a saving of power is obtained in connec- 9 tion with the fliers.

While the resulting slubbing can be received in the ordinary cans, it is preferable to employ receiving containers divided by partitions into rectangular compartments.

The method can be carried out by means of existing drawing frames, and no new, expensive, additional devices will be required.

According to the invention the slivers-obtained from the first drawing frame are led singly or in combination through a condensing funnel, the delivery orifice of which is located just above the nip of the pressing and drawing rolls whereby the fibres will be drawn out, paral- 50 leled and condensed into a very firm slubbing.

The slubbing will be firm enough to obviate, according to the desired count of the yarn, two or three flier passages or even to be spun directly on the ring spinning machine.

Fig. 1 of the accompanying drawings represents a plan view of a device for carrying out the improved method,

Fig. 2- is a diagrammatic side view of the device,

Fig. 3 is a side view of one of the funnels,

Fig. 4 is a vertical section of the'funnel, Fig. 5 is an inverted plan view of the funnel, and 1 Figs. 6 and '7 are views at right angles to each other of a modifiedform of the funnel;

From the well known last but one drawing frame the slivers are deposited in'cans I. From the latter the slivers pass through smallcondensing funnels 3 fitted with clamping springs and then between well known drawing rolls 4. The drawn out slivers then pass over a guide plate 5 and through specially oonstructedffunnels 6 provided with clamping springs; The slubbing thus obtained is compressed between press ing rolls 1 and 8. The funnels 6 are arranged with their lower pointed ends in close proximity to and almost in contact with the rolls 1, 8 but slightly out of symmetry therewith, as shown in Fig. 2. Instead of bearing against the roll 1 by gravity in the usual manner, the roll 8 bears against the latter with a pressure greater than its weight.

The funnels 3, 6 have each a cylindrical or tapering delivery passage 9 about 3 cm. in length. Applied to the outside of the funnel are blade springs I0 the free lower ends of which are channelled and adapted to mesh under spring action so as to condense the slubbing still further as it passes between them. The springs are adapted to yield to projecting elements on the slubbing and let them pass without breakage of the latter.

One of the springs may be omitted, in which case the funnel is provided, as shown in Figs. 6 and 7, with a laterally deposited outlet orifice l2 against which the channelled end of the remaining spring is adapted to bear for condensing the slubbing.

The funnels may be made of metal, but they are preferably made of some acetyl-cellulose or hydrocarbon (mixed polymerizate) substance. The guide plate 5 is provided at its front end with semicircular incisions whereby it engages the funnels 6 for the better guidance of the sliver bands.

The slubbing delivered by the rolls 1, 8 is received in a container l3. The latter is boxshaped and divided by partitions l4 into rectangular compartments for the reception of the slubbing. The container is reciprocated under the pressing rolls for the uniform distribution of the slubbing within the compartments. The rectangular shape of the compartments has the advantage of accommodating the largest amount of slubbing. The walls and partitions of the container may be provided with vertical slits through which a tool can be passed for compressing the slubbing within the container. The slits also allow the emptying progress of the container to be conveniently inspected when the container is placed on the ring spinning machine.

Rollers 29 are arranged above the container ii for the purpose of packing the slubbing into the container when the latter is full.

The funnels 3 condense the slivers and keep them at suitable distances apart between the drawing rolls. The funnels 6 further condense the slivers and turn them into a very firm slubbing. Additional funnels may be employed for leading the slubbing into succeeding drawing frames if such are employed.

The slubbing delivered by the device has a tearing length of 18 meters. This effect is obtained by the springs I and by the additional pressure of the roll 8.

The compartments of the container l3 have each an area of 2 x 12 inches. This corresponds to the diameter of 9 inches of the usual round cans. The width of 2 inches corresponds to the spacing of the spindles in the ring spinning machine, and the container will therefore be conveniently accommodated on the machine.

The weight of the slubbing containable in each compartment has been found to be 5,000 grams, 1. e., one months supply for one spindle. Usually a'spool of 250 grams is exchanged for each spindle every other day, so that the improved arrangement will effect a considerable saving of work.

The new method according to which the slivers are led through one or more funnels instead of through three fliers as usual, is the commencement of a new development in spinning practice.

The funnels are added to the ordinary drawing frames.

I claim:

1. A method for producing slubbing on drawing frames, consisting in feeding the sliver in the state it leaves the drawing frame through a funnel at the last pass of the drawing frame, in resiliently gripping the sliver on all sides as it leaves the funnel to produce a retarding moment and bring all the fibres even the smallest in parallel, and then feeding the sliver directly between taking up rolls.

2. An arrangement for producing slubbing on drawing frames, comprising in combination with a drawing frame, at least one funnel at the delivery end of said frame, said funnel having a substantially 3 cm. long delivery passage, and blade springs surrounding the outlet of said passage.

3. Anarrangement for producing slubbing on drawing frames, comprising in combination with a drawing frame, at least one funnel at the delivery end of said frame, said funnel having a delivery passage with a substantially straight inner wall, and blade springs surrounding the outlet of said passage.

4. An arrangement for producing slubbing on drawing frames, comprising in combination with a drawing frame, at least one funnel at the delivery end of said frame, said funnel having a delivery passage with a substantially straight inner wall, blade springs surrounding the outlet of said passage, and a pair of taking up cylinders, the outlet of said passage delivering directly in the nip between said taking up cylinders.

5. An arrangement for producing slubbing on drawing frames, comprising in combination with a drawing frame a plurality of funnels at the delivery end of said frame, blade springs surrounding the outlet of each of said funnels, a pair of taking up rolls directly below the delivery end of said funnels, a slubbing container located between said rolls, and partitions dividing said container into compartments each compartment adapted to receive a slubbing from one of said funnels.

BERNHARD PROSS. 

